I haven't used it much. I've attached an image of the receipt from when I purchased it on Rakuten. qdc SUPERIOR EX Cable 4.4 - IEM 2pin [Custom IEM 2pin connector (0.78mm) / 4.4mm balanced plug (metal sleeve straight)] Silver-plated OFC conductor 4-core cable, approx. 120cm, high conductivity 【QDC-SUPERIOR-EX-CABLE44】 ■To consider the overall sound balance of the SUPERIOR EX, we tested multiple cables to allow users to experience a wider dynamic range and deeper sub-bass reproduction, and adopted the original silver-plated OFC conductor 4-core cable. It features a wide range and neutral sound. ■A flat-type custom IEM 2pin connector (0.78mm) is used for the connector. ■A stylish 4.4mm 5-pole balanced straight plug with a metal sleeve is used for the plug. ■It is covered with a black PVC sheath, which is smooth to the touch and easy to handle. ●Color: Black ●Cable length: 1.2m ●Cable conductor: Silver-plated OFC conductor 4-core wire ●Connector: Custom IEM 2pin flat type (0.78mm) ●Plug: 4.4mm balanced / metal sleeve straight type ●Accessories: None ●Country of origin: China ●Manufacturer: 6 months from the date of purchase 【4.4mm balanced compatible silver-plated OFC conductor 4-core SUPERIOR EX Cable】SUPERIOR EX Cable 4.4 uses the original silver-plated OFC conductor 4-core cable. It is covered with a black PVC sheath, which is smooth to the touch and easy to handle. A custom IEM 2pin connector (0.78mm) is used for the connector. A stylish 4.4mm 5-pole balanced straight plug with a metal sleeve is used for the plug.